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Yup, I've been reading up on letting it warm up too lately. I guess it can ruin the catalytic converters. I'm not sure what else it affects. BMW recommends driving the car at moderated speeds within...

That's crazy that you've gone through 5 of them. What kind of T-stats have you been using? I'm still on the original one with 179k miles. I bet it's going to need replaced very soon because I posted...

If you run all four front wheels, yes. The offset of the E46 M3 rear wheels are too aggressive for a sedan. You would need some fender modification to make them fit. Like I said, run all four fronts...